Gannon Realty Group and Fireside Financial partnered to buy the Charter Place Apartments in Creve Coeur for $22 million. The deal is among the area’s largest multi-family sales in the past 18 months as investment sale activity has slowed to a crawl. The sale of the 284-unit property at 11907 Charter House Lane near Olive and I-270 closed March 3. Principal Global Investors of Des Moines, Iowa, bought the property in 2005 for $30 million.